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The habitual habit of repeatedly nibbling on nails and surrounding skin over a long period of time is called Body-Focused Repetitive Behaviors (BFRBs1
MPL-SST can encode information about self-grooming behavior
Photoactivation or chemogenetics chronic activation of somatostatin (SST) neurons in the medial parapontine nucleus (MPL) region of the midbrain promotes self-grooming behavior in female and male mice, and activation of non-SSTergic neurons does not play this roleFigure 1: MPL-SST-enabled neurons regulate self-grooming behavior
2
MPL-SST can neuronal upper and lower brain regions
Retrograde tracing virus experiments have found that MPL is mainly received from the central amygdala (CeA), terminal bed nucleus (BNST), ventral lateral midbrain periosteal gray matter (vlPAG), hypothalamic paraventricular nucleus (PVN), hypothalamus (IC), and auditory cortex (Au).Figure 2: MPL-SST can input neurons into brain regions
3
MPL-SST can encode reward information on neurons
Intracranial self-stimulation or conditioned location preference experiments have shown that light-activated MPL-SST neurons promote mice to stay on the sideFigure 3: MPL-SST can encode reward information for neurons
summary
This paper reveals the regulation of repetitive stereotyped self-grooming behaviors of MPL-STT neurons through multiple viral tracing and optogenetic techniques, which are mainly achieved by the CeA➟MPL-STT➟VTA dopamine neural circuit
【References】
1.
https://doi.
The pictures in the article are from references